atrioventricular node


Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.

atrioventricular node

n.
A small mass of specialized cardiac muscle fibers, located in the wall of the right atrium of the heart, that receives electrical impulses from the sinoatrial node and directs them to the conduction system in the walls of the ventricles. Also called A-V node.

a′trioventric′ular node`


n.
a small mass of conducting muscle fibers in the heart, at the base of the right atrium, that transmits heartbeat impulses to the ventricles.
[1930–35]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atrioventricular node - a node of specialized heart muscle located in the septal wall of the right atriumatrioventricular node - a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle
cardiac muscle, heart muscle - the muscle tissue of the heart; adapted to continued rhythmic contraction
References in periodicals archive ?
The impulse reaches the atrioventricular node, where it's momentarily delayed before it spreads throughout the walls of the ventricles.
He was re-admitted in May 2007 with paroxysmal atrial fibrillation secondary to atrioventricular node re-entry tachycardia (AVNRT) requiring anticoagulation.
We describe the main features of the cystic tumor of the atrioventricular node (CTAVN), another pseudoneoplastic lesion that may cause sudden death.
The electrical conduction system of the heart may have a bypass tract or a dual atrioventricular node which allows for reentry to occur.
The atrioventricular node (AVN) then serves as the electrical junction between the atria and the ventricles.
Origin of the sinoatrial node and atrioventricular node arteries in right, mixed, and left inferior emphasis systems.
Knowing which vessel is occluded before percutaneous coronary intervention can help in planning the procedure and recognizing when patients are at high risk for disturbances in conduction at the atrioventricular node.
Saxitoxin blocks sodium channels in nerve and muscle, which arrests impulse conduction and can suppress atrioventricular node conduction.

Full browser ?